Croatian sign language has been accepted as a self-sufficient language system in the Republic of Croatia, independent from the language of hearing people. Deaf and hard of hearing people have made their own culture, they have recognized their values and worth and have started a battle for the exercise of rights. In this paper is collected theoretical knowledge of (Croatian) sign language, the culture of Deaf and their particularities. From the short history of sign language, we can see how much communities and systems have progressed, but also how much more is left to progress. Influential people such as Helen Keller, Pedro Ponce de Leon, and Antun Zimmerman laid us the groundwork on which we can build a strong community where we are all equal. There are listed some researches that show the significance of sign language for the entire community. The biggest challenge today in care and education is creating an inclusive environment or schools for everyone. Unfortunately, many laws and articles stay only words on paper. In this paper, it is described how much sign language is represented in schools, where it is implemented, and in which way. Community is mainly in unity about including deaf people in the regular education system, but they come across challenges due to insufficient education. This paper aims to point out the importance of involving hearing people in the culture of deaf people and learning their language. Many advantages are shown of what pupil accomplishes throughout learning sign language, how much for deaf pupils that's how much for hearing pupils. Learning sign language is beneficial to everyone because it creates an enriched environment, reduces social impoverishment, and barriers in communication fade away. To show how sign language is possible to implement in teaching, at the end of the paper, it is presented the potential methodological scenario for learning Croatian sign language in the teaching of Croatian language in primary schools.